Payseur. Odd surname.
In French Dépayseur means a person who has been displaced from his country. That would make sense for a member of the French royal family after the French Revolution.
But the name is Payseur which basically means a person who is rooted in his country, a person who belongs in this land. This seems odd to me, except. 1789 is two years after the United States began. Did the French royals see the writing on the wall with the Jacquerie and bail? Did they somehow finance the American revolution secretly? Did they, in effect, buy the USA? Was this some extension of the whole mysterious Arcadia project that some French thinkers believed in? Some think that the reason the French built their fortress at Louisburg in what is now Canada was to protect an existing, and secret French colony, and this is why the region got the name Acadia.
Remember that the French monarchy supported the American revolutionaries in a material way. France and Britain had been at war, or in a state of near war for some time. Stealing away the rich territories of Britain's North American colonies would have been an ideal strategic move for France. But for the royal family, an even better move would be to use that new country as a refuge from the growing Jacobite revolutionary movement in France.
The United States is entirely to the West of the line that the Pope used when he granted Brazil to Portugal, and the rest to the Crown of Castile. Then Philip of Bourbon won the war of Spanish Succession and thus the House of Bourbon came to own these territories. Louis XVI of France, who assisted the Americans in their Revolution, was head of the House of Bourbon. The USA was his territory. If he moved his bloodline to the USA, then they were living in THEIR LAND so a name like Payseur would make perfect sense to them.